Politicos Arthur Allen has written a useful report on recent findings about EHR-related errors. We must keep in mind, however, that almost all EHR-related errors are unknown, and often unknowable. Why?The most common errors involved with EHRs are medication prescribing errors. But we seldom find those errors because those type of errors seldom manifest themselves because so many hospitalized patients are old and sick, have several co-morbidities and are taking many other medications. Key organs, like the liver, kidney and heart, are compromised. Bad things can happen to these patients even when we do everything right; conversely, good things can happen even when we do much wrong. We usually miss the results of, say, a wrongly prescribed medication. (Note: these types of missed medication errors contrast to leaving a pair of hemostats in the gut or to wrong-site surgerywhere most errors soon become obvious).

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